采用Yamazaki聚合体系,以9,9-二[4-(4-羧基苯氧基)苯基]呫吨(BCPX)为第三单体,将其与对苯二甲酸(PTA)、对苯二胺(PPD)进行共缩聚反应,合成了一系列含呫吨结构的聚酰胺共聚物.研究了单体摩尔浓度、反应温度、BCPX和PTA摩尔比等对共聚反...采用Yamazaki聚合体系,以9,9-二[4-(4-羧基苯氧基)苯基]呫吨(BCPX)为第三单体,将其与对苯二甲酸(PTA)、对苯二胺(PPD)进行共缩聚反应,合成了一系列含呫吨结构的聚酰胺共聚物.研究了单体摩尔浓度、反应温度、BCPX和PTA摩尔比等对共聚反应的影响,并用IR、DSC、TGA等方法对共聚物进行了表征.结果表明,新型聚芳酰胺的对数比浓粘度为1.90~2.95 d L·g^(-1),具有较高的玻璃化温度(Tg=297.3~320.5℃),在氮气氛中5%热失重温度为522~540℃,800℃时的残炭率在51%以上.随着单体BCPX和PTA摩尔比的增加,共聚物的Tg逐渐降低,当BCPX和PTA摩尔比大于50/50时,共聚酰胺在常温下可溶于N-甲基-2-吡咯烷酮、N,N-二甲基乙酰胺、吡啶等极性有机溶剂中.展开更多
A novel facile solid-phase organic synthesis of aryl vinyl ethers by reaction of polystyrene-supported 2-phenylsulfonylethanol with phenols under Mitsunobu conditions and subsequent elimination reaction with DBU has b...A novel facile solid-phase organic synthesis of aryl vinyl ethers by reaction of polystyrene-supported 2-phenylsulfonylethanol with phenols under Mitsunobu conditions and subsequent elimination reaction with DBU has been developed. The advantages of this method include straightforward operation, good yield and high purity of the products. Alternatively, a typical example of Suzuki coupling reaction on-resin was further applied to prepare 4-phenylphenyl vinyl ether for extending this method.展开更多
文摘采用Yamazaki聚合体系,以9,9-二[4-(4-羧基苯氧基)苯基]呫吨(BCPX)为第三单体,将其与对苯二甲酸(PTA)、对苯二胺(PPD)进行共缩聚反应,合成了一系列含呫吨结构的聚酰胺共聚物.研究了单体摩尔浓度、反应温度、BCPX和PTA摩尔比等对共聚反应的影响,并用IR、DSC、TGA等方法对共聚物进行了表征.结果表明,新型聚芳酰胺的对数比浓粘度为1.90~2.95 d L·g^(-1),具有较高的玻璃化温度(Tg=297.3~320.5℃),在氮气氛中5%热失重温度为522~540℃,800℃时的残炭率在51%以上.随着单体BCPX和PTA摩尔比的增加,共聚物的Tg逐渐降低,当BCPX和PTA摩尔比大于50/50时,共聚酰胺在常温下可溶于N-甲基-2-吡咯烷酮、N,N-二甲基乙酰胺、吡啶等极性有机溶剂中.
基金Acknowledgement This work was supported by the National Natural Science Foundation of China (No. 21062007) and the Research Program of Jiangxi Province Department of Education (No. GJJ10385, GJJ11380).
文摘A novel facile solid-phase organic synthesis of aryl vinyl ethers by reaction of polystyrene-supported 2-phenylsulfonylethanol with phenols under Mitsunobu conditions and subsequent elimination reaction with DBU has been developed. The advantages of this method include straightforward operation, good yield and high purity of the products. Alternatively, a typical example of Suzuki coupling reaction on-resin was further applied to prepare 4-phenylphenyl vinyl ether for extending this method.